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Proximity Sensor Question & Answers

July 9, 2022 By WatElectronics

This article lists 75 Proximity Sensor MCQs for engineering students. All the Proximity Sensor Questions & Answers below include a hint and a link to the relevant topic wherever possible. This is helpful for users preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of Proximity sensors. 

Sensors that are utilized in detecting any presence or the movement of objects without contacting them physically are known as Proximity Sensors. The info gathered in these sensors is captured and converted into an 'Electrical signal'.

Proximity sensors are ‘contactless or non-contact’ ones. Due to this, there is no physical harm caused to the objects. These sensors work based on signals without any physical part intervention that makes movements.

The signals transmitted are allowed by Proximity Sensors to monitor the area sensed close. There are various types of Proximity sensors. But the most commonly used ones are Capacitive and Inductive.

These sensors measure the dynamically changed diameter, distance, and depth. Counting is one of the most common application areas where proximity sensors are placed. Even cell phones used nowadays have built-in IR sensors.

1). Proximity sensor is _______?

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2). Proximity sensors are utilized for working along ___________?

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3). Proximity sensors have ______?

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4). What happens to the output when the object entered into sensing area?

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5). What kind of sensors utilized in the detecting near objects?

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6). What do you refer the object detected using Proximity sensor?

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7). What happens if the target size is lesser than Standard target?

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8). What happens if the target size is small?

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9). Why do Proximity sensors is highly reliable?

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10). Proximity sensors are ______ by Surface?

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11). How are proximity sensors affected?

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12). What are the various proximity sensors?

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13). What are the various Capacitive proximity sensors?

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14). How the object proximity detected in capacitive proximity sensors?

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15). What are the factors that affect capacitance?

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16). What type of proximity sensors are preferred for Liquid level detection?

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17). What is the dielectric in capacitive proximity sensor?

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18). What is the condition to detect target in dielectric capacitive sensor?

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19). Capacitance is _________ if the target is absent?

Add description here!

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20). How does the capacitance affected if the target moved closer to sensor?

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21). What kind of objects detected by Capacitive sensors?

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22). How the capacitance and the oscillations amplitude affected in capacitive sensors?

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23). Conductive Capacitive sensor has ______ in capacitor?

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24). For Electrically conductive materials ________ capacitive sensor is used?

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25). What happens if the oscillation exceeds Pre-determined values in Capacitive sensor?

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Proximity Sensor MCQs for Interviews

26). What is the dielectric in conductive capacitive proximity sensors?

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27). Capacitive type proximity sensors maximum sensing range is _____?

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28). Non-metals & metals both detected using _______ proximity sensors?

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29). What types of proximity sensors detect presence of human?

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30). What variant of Proximity Sensor utilized as Touch sensor?

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31). What is principle based on Inductive proximity sensor works?

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32). What type of oscillator used in Inductive proximity sensor?

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33). What kind of proximity sensor is used in detection of metallic objects?

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34). In Proximity sensor _______ is used for switching?

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35). What transistor is used for positive side switching?

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36). NPN in BJT preferred for _________?

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37). NMR in Inductive Proximity Sensor is ______?

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38). What are the various types of Inductive Proximity sensor based on Structure?

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39). Do Inductive Proximity sensors detect dirty or wet metal objects?

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40). Which metal has a larger proximity to get detected using Inductive Proximity sensors?

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Proximity Sensor MCQs for Exams

41). How the objects detected using Photoelectric Proximity sensors?

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42). What are the various configurations of Photoelectric Proximity Sensors?

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43). What happens in Reflective Sensor in presence of target?

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44). What are the advantages of Reflective type Proximity Sensor?

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45). What is the set-up of Through–Beam sensors?

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46). Which configuration of Photoelectric Proximity Sensor is complex while installation?

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47). Which is the accurate method of sensing in Photoelectric Proximity Sensors?

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48). Which method has the Longest range of sensing in Photoelectric Proximity Sensors?

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49). The object itself enact as reflector in ____________ type of photoelectric proximity sensors?

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50). What type of magnet needed to measure high temperatures in Magnetic Proximity Sensor?

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51). Which Proximity sensor measures temperature in harsh conditions?

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52). The maximum sensing range of magnetic proximity sensors is ____?

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53). GMR is __________?

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54). What principle is followed by magnetic proximity sensors?

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55). GMR structure is used in _____?

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56). _____ in magnetic proximity sensors used in reading data in MEMs?

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57). Which sensor doesn’t get affected by electrical noise & work with DC?

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58). IR proximity sensor utilizes what kind of light for transmission?

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59). Which sensors operate using sound frequency?

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60). Ultrasonic Proximity sound frequencies range is _____?

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Proximity Sensor MCQs for Quiz

61). A Diffuse & Reflective sensor has Transmitter & Receiver in ____ housing?

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62). At closer proximity ________ sensors are blind zoned?

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63). Can a Human being detected using IR Proximity sensor?

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64). Proximity sensors detect object using __________?

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65). On what basis the objects distance is determined in Ultrasonic Proximity sensors?

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66). Which proximity sensors preferred in Food processing & Packing?

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67). What is the purpose of Hall-effect sensor?

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68). What type of Proximity sensors preferred in security systems?

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69). Which Proximity sensor is preferred in Automotive Industry?

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70). Food industry in cleaning department prefer ______ Proximity sensor?

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71). Which Proximity sensor reads temperature of objects moving dynamically?

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72). Which Proximity sensor has max. range of detecting temperature?

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73). What type of protocol is followed by proximity sensors?

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74). What type of sensors detects the position of target?

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75). What proximity sensor placed in Mobiles to switch On/Off display?

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